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From $40K
Production in 4 months
React Native + Solidity

Blockchain Development Services

Most blockchain projects stall on security reviews or blow past their timeline. We build mobile-first dApps that ship in 4 months and pass a third-party audit before they ever touch mainnet.
What you get:
Audited smart contracts with a third-party security review, so exploits get caught before they reach mainnet.
Fixed scope and milestones agreed before kickoff, so your budget and timeline are set on day one.
Mobile-first architecture on React Native, so one codebase powers your dApp on both iOS and Android.
Full source code and repository ownership, so the product stays yours with no vendor lock-in.

Our expertise in numbers

550+
projects delivered
70%
of clients return for a second project
210+
specialists on the team
10+
years in the market — not a single unfinished project
Clutch Top Developers 2024
4.9 on Clutch (44 reviews)
Best Design Award 2023
Clutch Top Developers 2024
4.9 on Clutch (44 reviews)
Best Design Award 2023
Clutch Top Developers 2024
4.9 on Clutch (44 reviews)
Best Design Award 2023

Who we help

We work with founders launching their first on-chain product, CTOs scaling an existing platform, and product owners adding blockchain to a live app.

Founders

For founders who need a working blockchain product to show investors or users, without spending months hiring a Web3 team first.
Working with us, you:
Launch a working dApp in 4 months with a budget from $40K
Get a 3-day technical scoping that fixes architecture and cost up front
Validate your idea with real users instead of another pitch deck
Save up to 40% by prioritizing features by business value, not guesswork
Keep full ownership of the source code, with no vendor lock-in

CTOs

For CTOs who need senior blockchain engineers fast, either to ship a new product or to extend a team that has no Web3 capacity in-house.
Working with us, you:
Add a senior team in 2 weeks instead of a months-long hiring cycle
Ship smart contracts that pass a third-party security audit before mainnet
Get code by your standards: CI/CD, code review, tests over 80%
Build on the right network for your case, from Ethereum to Solana
Hand the project to your in-house team anytime, with full documentation

Product owners

For product owners who run a live app and want to add a wallet, payments or a token layer without disrupting users or rebuilding from scratch.
Working with us, you:
Add blockchain features to your current product, not a full rewrite
Get a clear read on what integrates cleanly and what needs rework
Wire smart contracts and wallet logic into your existing flows
Keep production running with a migration path that avoids downtime
See progress every sprint, with a demo at the end of each two weeks

AND EVERYONE ELSE

If your scenario isn't listed above, that doesn't mean we can't help.
Fill a form and you'll get:
Blockchain scoping in 3 days: architecture, smart contract scope, and estimate
Analysis of your idea or current app and the on-chain opportunities in it
Integration recommendations for your existing backend, wallet, or payment stack
Signed NDA before the first call

When blockchain technologie development fits your case

From a first idea to a live dApp, a clear path at every stage of the project.

Have a blockchain idea but no team to build it

Hiring blockchain engineers in-house takes months of recruiting, and strong Web3 talent is scarce. We bring a team that already ships dApps, so you move from concept to a working product instead of a hiring backlog.
Show details
When this is relevant:
A validated idea that needs a working dApp, not another pitch deck
No in-house Web3 or smart contract engineers on the team
Investors expect a live product before the next funding round
Time to market matters and hiring would cost you months
Our approach:
We run a 3-day technical scoping to define architecture and scope
We build in two-week sprints with a demo at the end of each one
We keep the process transparent, so you see every sprint live
We hand over full source code and docs, or stay on for support
What you get:
A working dApp in 4 months, ready to demo to investors and users
A 3-day scoping that fixes architecture, stack and budget up front
Lower spend through tight feature prioritization by business value
A senior team already shipping on Ethereum, Solana and other networks

Need blockchain inside an app you already run

You do not always have to rebuild from scratch. In most cases we add a crypto wallet, smart contract logic or token features to your existing app, so you keep your product and users while gaining blockchain functionality.
Show details
When this is relevant:
A live product that needs a wallet, payments or a token layer
A move into DeFi or tokenization without a full rewrite
An existing user base you cannot afford to disrupt
A backend that needs to talk to a blockchain network
Our approach:
We audit your current architecture before touching any code
We map which blockchain network and stack fit your case
We integrate through APIs and connectors, so the app stays stable
We test on a testnet before anything reaches mainnet
What you get:
Blockchain features added to your current app, not a rebuild
A clear read on what integrates cleanly and what needs rework
Smart contracts and wallet logic wired into your existing flows
A migration path that keeps production running throughout

Smart contracts have not been audited

An unaudited smart contract holds real funds and cannot be patched once deployed. We review the contract code for exploits, fix what we find and re-test, so vulnerabilities get caught before they reach mainnet rather than after.
Show details
When this is relevant:
Smart contracts heading to mainnet without an external review
A DeFi or wallet product where contracts custody user funds
A past deploy that was never checked for known exploits
Compliance or investors asking for a security sign-off
Our approach:
We review contract logic line by line against known exploits
We run automated and manual checks, then document findings
We fix issues, re-test, and confirm on a testnet before deploy
We add GDPR and compliance checks where user data is involved
What you get:
A third-party smart contract audit with a written report
A prioritized list of vulnerabilities, from critical to minor
Fixed and re-tested contracts, verified on a testnet
Protection against common exploits like reentrancy and overflow

Blockchain mobile app development cost

Transparent ranges by project complexity. Exact pricing comes after a 3-day technical scoping, which fixes architecture, scope and budget before any code is written.

Simple project

from $40K
Timeline: 3 months
1 smart contract, 1 network | Core on-chain logic
Wallet integration
One audited smart contract
Single-network deploy
Basic dApp frontend
Examples: token launch, crypto wallet integration, simple NFT minting

Medium project ⭐

from $80K
Timeline: 5 months
Several contracts, integrations | Production dApp
Multiple smart contracts
Third-party audit
DeFi or NFT logic
Backend
Mobile-first frontend on React Native
Examples: DeFi staking app, NFT marketplace, multi-currency wallet

Complex project

from $150K
Timeline: from 6 months
20+ screens, high load | Custom architecture
Custom on-chain architecture
Multiple network support
Advanced security
High-load backend
Full compliance layer
Examples: crypto exchange, enterprise blockchain network, tokenization platform
Note:
Exact cost depends on:
the number and complexity of smart contracts
third-party and on-chain integrations
security and audit requirements
how many blockchain networks you target
Get the exact cost and timeline for your blockchain project
Free technical scoping in 3 days: architecture, estimate, and roadmap. NDA signed before we discuss any details.
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Let’s go!
Let’s go!
Get the exact cost and timeline for your blockchain project
Free technical scoping in 3 days: architecture, estimate, and roadmap. NDA signed before we discuss any details.
Your role in the project
Service of interest
Budget
Please select one option in each category
Request sent
Our manager will contact you shortly.
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How we build your custom blockchain product

We work in 2-week sprints with a demo at the end of each one. From the first call to mainnet, you always know what stage the project is at and what ships next.
1

Scoping and architecture

We turn your idea into a technical plan: the right network, the stack, and a realistic budget and timeline.
Duration: 3 days
We break down your requirements, choose the blockchain network that fits your case, and map the on-chain logic. We flag technical risks early and estimate scope, so there are no surprises once development starts.
What you get:
A fixed architecture and tech stack, so you know how the product is built
A realistic budget and timeline you can plan the roadmap around
A network recommendation, whether Ethereum, Solana or another chain
2

Smart contract development

We write the contracts that hold your on-chain logic: tokens, transactions, and the rules your dApp runs on.
Duration: 3 weeks
We develop the smart contracts in Solidity or the language your chosen network uses, then cover them with automated tests. We deploy to a testnet first, so the logic is verified before any real funds are involved.
What you get:
Tested smart contracts deployed to a testnet for verification
Token and transaction logic built to your product rules
Test coverage over 80%, so issues surface before release
3

dApp development

We build the product around the contracts: a mobile-first frontend and the backend that connects it to the blockchain.
Duration: 6 weeks
We build the frontend on React Native, so one codebase runs on iOS and Android. We connect it to the blockchain through APIs, wire up wallet and payment flows, and demo working features to you every two weeks.
What you get:
A working dApp on iOS and Android from a single codebase
Wallet and transaction flows integrated and tested
A demo at the end of every sprint, so you steer the product live
4

Security audit and testing

We review the whole product for exploits before it goes live.
Duration: 2 weeks
A third-party audit reviews the contract code line by line against known exploits like reentrancy and overflow. We run QA across the dApp, fix what we find, and re-test, so vulnerabilities are caught before mainnet.
What you get:
A third-party smart contract audit with a written report
Fixed and re-tested code, verified on a testnet
A security sign-off you can show investors and partners
5

Mainnet release and support

We ship the product to mainnet and keep it stable while you focus on growth.
Duration: release in 1 week, support ongoing
We deploy to mainnet, monitor stability, and ship hotfixes for critical issues straight after launch. Ongoing support is a separate service with its own SLA, so the product stays reliable as usage grows.
What you get:
Your product live on mainnet, monitored after launch
Full source code and repository ownership, with no lock-in
Optional 24/7 support with an SLA and monitoring

What our clients say about us

Pogovorim.online service screenshots
William Angel
Personalised — wellness app design

I'm the CTO of Personalised Co., an app for tracking supplement and vitamin intake. Purrweb designed the product's UI/UX with a Shopify store integration for automatic reordering, and built an interface for healthy living with personalized tracking.

Personalised — wellness app design
HealthTech, Design, Mobile app, Shopify, Wellness

Personalised Co. is an app for people who take supplements and vitamins regularly: intake tracking and automatic reordering through a Shopify integration. Purrweb designed the product's UI/UX with a supplement marketplace and a personal intake schedule.

View full case
Pogovorim.online service screenshots
Seth Abel-Sadeq
KEM — Payment app

I'm the CEO of KEM, a P2P mobile payment service for the Kuwaiti market, where not everyone has access to online banking. Our banking partners needed an MVP for demonstrations. Purrweb delivered the design and the MVP, working around the restrictions on connecting to the banking API. On completion, they handed the project over to our in-house team with full documentation and a month of technical support.

KEM — Payment app
Fintech, Design+Development, Mobile app, Cross-platform, MENA

KEM is a P2P app for instant money transfers in the Kuwaiti market: linked bank cards, money requests from the contact list, and transaction history. The key challenge: for security reasons, Kuwaiti banks don't allow outside developers to work with their API — so Purrweb built the back end on mock data, fully simulating the final functionality for demos.

View full case
Pogovorim.online service screenshots
Matt Brzowski
Founder
Buzz

I'm building Buzz, an app for finding and organizing events in small American towns. I came to Purrweb with almost nothing — just an idea. Purrweb helped with marketing, brand identity, and the logo, and walked the whole road to MVP with us, even when our requirements shifted a lot in the early stages. I valued the flexibility and the quality of the design.

Buzz
Lifestyle, Design+Development, Mobile app, Social app, Geolocation

Buzz is a geosocial service for residents of small American towns: a geolocation-based feed of public events, private events with friend invites, group chats, and a Ticketmaster integration. Purrweb created the brand identity from scratch, optimized the architecture, reused ready-made modules, and shipped the MVP in 12 months.

View full case
William Angel
Personalised — wellness app design

I'm the CTO of Personalised Co., an app for tracking supplement and vitamin intake. Purrweb designed the product's UI/UX with a Shopify store integration for automatic reordering, and built an interface for healthy living with personalized tracking.

Personalised — wellness app design
HealthTech, Design, Mobile app, Shopify, Wellness

Personalised Co. is an app for people who take supplements and vitamins regularly: intake tracking and automatic reordering through a Shopify integration. Purrweb designed the product's UI/UX with a supplement marketplace and a personal intake schedule.

View full case
Seth Abel-Sadeq
KEM — Payment app

I'm the CEO of KEM, a P2P mobile payment service for the Kuwaiti market, where not everyone has access to online banking. Our banking partners needed an MVP for demonstrations. Purrweb delivered the design and the MVP, working around the restrictions on connecting to the banking API. On completion, they handed the project over to our in-house team with full documentation and a month of technical support.

KEM — Payment app
Fintech, Design+Development, Mobile app, Cross-platform, MENA

KEM is a P2P app for instant money transfers in the Kuwaiti market: linked bank cards, money requests from the contact list, and transaction history. The key challenge: for security reasons, Kuwaiti banks don't allow outside developers to work with their API — so Purrweb built the back end on mock data, fully simulating the final functionality for demos.

View full case
Matt Brzowski
Founder
Buzz

I'm building Buzz, an app for finding and organizing events in small American towns. I came to Purrweb with almost nothing — just an idea. Purrweb helped with marketing, brand identity, and the logo, and walked the whole road to MVP with us, even when our requirements shifted a lot in the early stages. I valued the flexibility and the quality of the design.

Buzz
Lifestyle, Design+Development, Mobile app, Social app, Geolocation

Buzz is a geosocial service for residents of small American towns: a geolocation-based feed of public events, private events with friend invites, group chats, and a Ticketmaster integration. Purrweb created the brand identity from scratch, optimized the architecture, reused ready-made modules, and shipped the MVP in 12 months.

View full case
Do you want to order a development?
We will discuss your project in 30 minutes: we will assess the complexity, suggest solutions, and name approximate deadlines and budgets. We sign the NDA before the call. No strings attached.
This field is required
Incorrect number
Incorrect Email
This field is required
Please fill in all fields
Let’s go!
Let’s go!
Do you want to order a development?
We will discuss your project in 30 minutes: we will assess the complexity, suggest solutions, and name approximate deadlines and budgets. We sign the NDA before the call. No strings attached.
Your role in the project
Service of interest
Budget
Please select one option in each category
Request sent
Our manager will contact you shortly.
Oops! Something went wrong while submitting the form.

FAQ

How much does blockchain app development cost?

It depends on complexity. A simple project with one smart contract starts at $40K, a production dApp with several contracts and a third-party audit runs $80K–150K, and a complex platform with custom architecture starts at $150K. You get an exact figure after a 3-day technical scoping.

What is the difference between a blockchain app and a dApp?

A blockchain app uses blockchain for one part, like payments, while its core still runs on a normal backend you control. A dApp runs its key logic on smart contracts on a blockchain network, with no central server in charge.

How long does it take to build a blockchain application?

A production dApp takes about 5 months: 3 days of scoping, 3 weeks on smart contracts, 6 weeks on the dApp, and 2 weeks of security audit before mainnet. A simple single-contract product ships in 3 months.

Which blockchain platform is best for my app: Ethereum, Solana, or Hyperledger?

There is no single best one. Ethereum suits public DeFi and NFT products with the widest tooling, Solana fits apps that need high speed and low fees, and Hyperledger works for private enterprise networks where access is restricted.

Can I integrate blockchain into an existing app, or do I need to build from scratch?

In most cases you can integrate, no rewrite needed. We audit your current architecture, then add a wallet, smart contracts or a token layer through APIs while production keeps running.

What are the biggest challenges in developing a blockchain?

The two hardest parts are security and immutability. Smart contracts custody real funds and cannot be patched once deployed, so a third-party audit before mainnet is essential.

Is blockchain suitable for small businesses and startups, or only enterprises?

Both. Startups use it for crypto wallets, DeFi and tokenization, often starting with one audited contract from $40K. Enterprises use private networks like Hyperledger for supply chain and internal systems.